EC flux tower locations

Flux data overview

GPP

Date

Julian day

Temperature

VPD

Radiation

NDVI

## 
## Call:
## lm(formula = ndvi ~ rain_rs30, data = df_flux_met_lsat_global_grass_filtered)
## 
## Residuals:
##      Min       1Q   Median       3Q      Max 
## -1.04658 -0.14996 -0.04013  0.13630  0.58824 
## 
## Coefficients:
##              Estimate Std. Error t value Pr(>|t|)    
## (Intercept) 3.205e-01  2.703e-04  1185.9   <2e-16 ***
## rain_rs30   1.719e-03  3.309e-06   519.6   <2e-16 ***
## ---
## Signif. codes:  0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1
## 
## Residual standard error: 0.1921 on 1086571 degrees of freedom
##   (2904 observations deleted due to missingness)
## Multiple R-squared:  0.199,  Adjusted R-squared:  0.199 
## F-statistic: 2.699e+05 on 1 and 1086571 DF,  p-value: < 2.2e-16

Rain

## 
## Call:
## lm(formula = gpp ~ rain_rs15 * swrad_tower, data = df_flux_met_lsat_global_grass_filtered)
## 
## Residuals:
##      Min       1Q   Median       3Q      Max 
## -18.4928  -1.9649  -0.8652   1.3499  21.8905 
## 
## Coefficients:
##                        Estimate Std. Error t value Pr(>|t|)    
## (Intercept)           6.301e-01  2.373e-02   26.55   <2e-16 ***
## rain_rs15             7.159e-03  5.364e-04   13.35   <2e-16 ***
## swrad_tower           6.445e-03  1.114e-04   57.88   <2e-16 ***
## rain_rs15:swrad_tower 1.708e-04  2.494e-06   68.46   <2e-16 ***
## ---
## Signif. codes:  0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1
## 
## Residual standard error: 3.225 on 165382 degrees of freedom
##   (924091 observations deleted due to missingness)
## Multiple R-squared:  0.251,  Adjusted R-squared:  0.251 
## F-statistic: 1.847e+04 on 3 and 165382 DF,  p-value: < 2.2e-16